US Patent Issued to TDK on April 22 for "Optical circuit element" (Japanese Inventors)

ALEXANDRIA, Va., June 6 -- United States Patent no. 12,282,191, issued on April 22, was assigned to TDK Corp. (Tokyo).

"Optical circuit element" was invented by Hiroki Hara (Tokyo), Takashi Kikukawa (Tokyo) and Atsushi Shimura (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "An optical circuit element capable of preventing stray light propagated through a part including a substrate of the optical circuit element from being emitted to the outside is provided. The optical circuit element has a substrate, an optical waveguide layer that is formed on one surface of the substrate, and a protective layer that is overlaid on the optical waveguide layer. The optical waveguide layer has an optical waveguide conf...